检测是否在PHP中启用了cookie

Question

我试图检测我的页面上的用户是否启用了cookie.以下代码执行检查,但是,我不知道如何将用户重定向到他们来自的页面.

该脚本启动会话并检查它是否已检查过cookie.如果没有,它会将用户重定向到测试页面,因为我在第一页中调用了session_start(),所以如果用户代理启用了cookie,我应该看到PHPSESSID cookie.

问题是,该脚本可能是从我网站的任何页面调用的,我必须将它们重定向回所选页面,比如index.php？page = news&postid = 4.

session_start();
// Check if client accepts cookies //
if (!isset($_SESSION['cookies_ok'])) {
    if (isset($_GET['cookie_test'])) {
        if (!isset($_COOKIE['PHPSESSID'])) {
            die('Cookies are disabled');
        } else {
            $_SESSION['cookies_ok'] = true;
            header(-------- - ? ? ? ? ? -------- -);
            exit();
        }
    }
    if (!isset($_COOKIE['PHPSESSID'])) {
        header('Location: index.php?cookie_test=1');
        exit();
    }
}

Answer 1

我认为最好制作一个文件集cookie并重定向到另一个文件.然后下一个文件可以检查该值并确定是否启用了cookie.查看示例.

创建两个文件,cookiechecker.php和stat.php

// cookiechecker.php
// save the referrer in session. if cookie works we can get back to it later.
session_start();
$_SESSION['page'] = $_SERVER['HTTP_REFERER'];
// setting cookie to test
setcookie('foo', 'bar', time()+3600);
header("location: stat.php");

和

stat.php

<?php if(isset($_COOKIE['foo']) && $_COOKIE['foo']=='bar'): 
// cookie is working
session_start();
// get back to our old page
header("location: {$_SESSION['page']}");
else:            // show the message ?>
cookie is not working
<? endif; ?>

cookiechecker.php在浏览器中加载它会告诉cookie is working.用命令行调用它curl.它会说,cookie is not working

更新

这是一个单一文件解决方案.

session_start();

if (isset($_GET['check']) && $_GET['check'] == true) {
    if (isset($_COOKIE['foo']) && $_COOKIE['foo'] == 'bar') {
        // cookie is working
        // get back to our old page
        header("location: {$_SESSION['page']}");
    } else {
        // show the message "cookie is not working"
    }
} else {
    // save the referrer in session. if cookie works we can get back to it later.
    $_SESSION['page'] = $_SERVER['HTTP_REFERER'];
   // set a cookie to test
    setcookie('foo', 'bar', time() + 3600);
    // redirecting to the same page to check 
    header("location: {$_SERVER['PHP_SELF']}?check=true");
}